Lead-measuring machine for gauges



R. HELL LEAD MEASURING MACHINQ FOR GAUGES 3 Sheets-Shet 1 Filed 531 i). 1920 a amas R. HLL

LEAD MEASURING MACHINE FORGAUGES s Sheets-She et 2 Filed Sept. 1, 1920 a. 115, m3; mmsas R. HILL LEAD MEASURING MACHINE FOR GAUGES Filed Sept. 1, 1920 3 Sheets-Sheet 5 gvwmtoz anti-Ban HILL, or HART ORD, ooimn'orlon'r,nssienoaTo mid a wnnnnioom ram, or new Yonmniy ACQRPORATIONO-ENEW JERsEY.

' Lnan-MnAsUnine MACHINE FOE eAUGEs."

Application filedlseptemb er 1, 1e2o. ser arno]. 407,396.

To all whom it may concern) certain new and useful Improvementsin, Lead-Measuring .Mach nes for Gauges, t

Be it known that I, REUBEN HILL,- a cities zen of the United States of America,--residing at Hartford, in the county of Hartford and State of: Connecticut, have invented which the following is a specification;

This invention relates to linear measur-ii "111g machines and especially to a linear measuring machine for determlning the pitch or lead ofscrew threads. Moreespe- Z cially, ,theinvention is designed for deterv threads. V

Lao

flmining the pitch or lead of tapered screw .jtlireads as, for instance, thread gauges for the Briggs .taper or other standard. pipe One of the fobj so determined with a high degree of precision. vOne feature of the invention that is advantageous is that the measurement isalwavs taken with *the contact member pressed against 'thelthread's ofthe gai'ige beingjtestcd'with a uniform pressure at the different pointsalong the length of the gauge.

Anotherfeature that enables me to ob-- 'tain a high degree of precision is that the contact member engaging the gauge being tested is mounted on a carria e restin on antifriction bearings and the carriage is pressed uniformly against the measuring anvil of --a measuring head; Another feature of advantage ofmy improvement is that the construction .permitsjine to use a standard linear measuring head having a high degree of precis on.

With these and other ,ObJects in view-"my 3 invention consists inthe' features of-coir struction andv operation setforth in the -fol-.

lowing specification and illustrated inthe accompanylng drawings;

' embodied and that the drawings are not to be construed as defining or limiting, the

scope of the' invention, the claims appended at the. end of this specification being relied a upon ffor that purposets of the, invention is to j provide animproved m-achine'bymeans'of which qthe distance between adjacent threads ota tapered thread gauge may be in the accompanying drawings annexed V In the drawings:

Figure 1 isa plan View of the machine. J I Fig. 2 is afront elevation of the same;

.i' e is an end elevation. i

Fig. iis a section taken on Eig t is afragmentary view showings plan view 'ofthe indicator used in conneccomplete "line of tion with the measuring machine.-

F'g'. 6 is a view showing the connection:

hetween the measuring head and carriage." 'ig, 7 is a side view of the partsshow'n in fiy,m inventionin its broadest pee-t comprises" the fol-lowing principal parts} first,a base; second, a 'mea'suring headfad ustably mounted thereon; third, a r

carriage mounted to slide witli a minimum otiriction in any direction on the base in a horizontal plane; fourth, centers on which a gauge may be mounted with its axis paral:

lel to thefline-of movement of the measuring head; and fifth, an indicator mounted onthe carriage adaptedto engage the threadsbe= ing examined. V

This application contains'subject matter also shown in-my applicationfor measuring machines ior'gauges, Serial No. @7598 filed; on even date herewith. n

Iteierringmore indetailfto the'figures oi the drawings, the machine or device is shown arranged for determining the leader pitch of the screwthreads on a gauge A. A -tlt is shown a suitable base provided on one side with suitableguide'ways preferably' formed as shown in Fig- 3 as aninver't'ed v 12 and a planes'urface 13. these ways 12'and'l3a measuring head 14 is adapted to slide longitudinally and be clamped in ad.- jnstecl position alongthe base lOby means of screw 15 and knurled nut 16 This measuring head 14 is i'nevelyway similarw that used in standard linear measuring mai chines and] a detailed description of it is therefore thought, to be unnecessary. i Sufice it to say thata contact anvil 17 m0unted on the forward end of a measuring pluni ger 18 is movable in and out ofthe head 14 by rotation of theiknurled head 19,011 which ismounted a graduated indicating dial20. By means ofa reading taken on the dialfi and also on ja scale shown at 21 the position of the -.-forward end of the anvil 17 may be determined with a high degree-of precision.

. In suitableieguideways2o, 25 frrned in; the ba'sflO parallel to the guideways l2 and '13 is mounted a plurality of balls 26 on which rests a saddle 27 having guideways adapted to correspond with 'guideways 25;

Similarl in uidewaVs 30 'itornied in the 1 3 21 v upper surface of saddle 27 are'balls 31011 which rests a carriage 35 provided with uidewar-s 36 extendinmin a direction at g .Y b

two sets of ball bearings extending in .straight lines at right angles toeacn other right angles to guideways 28 on the saddle 2 7.

It will thus be seen that by means ofthese the carriage may. slide in any direction in a horizontal plane with a minimum of friction. The carnage 35 thus forms a sl1 d ahleflbase or mounting on which is fitted an indicator adaptedlto engage the threaded surface of a gauge at the time. measurements are being taken. Q s V V V On the carriage 35is adjustably mounted a slidable support QO' preferably'guided n 'qitsj OVGIHQIllZS 'fOIW ZIE'Cl' and back on the carriage by suitable'guldeways 1n the form of a V. lland'aplane surface 4:2,011

the carriage and engaged, by co'rre} spondingly formed surfaces 'on the l'ower --.;'suiit'aceotthe support tO, I 1 7 To'-- conveniently. move the support 410 backward and forward on the.

I provide a lrnurl headed member to 1 whieh is attached a sinall pinion 46 preferahlyforined integrally on the sanie member as the linurledhead l5. This member e5 7 with pinion 46 is rotatably secured'in the carriage 35 as shown. On the: lower surface of the support 1013 forinede rack e7 meshing with the pinion 46 sothet by rotating the knurled member 415 the si pport lQ may he movedbackward or forward on thecarmgr 35. Thesupport 40 may be clamped in adjusted position by means ota screw ,i7 and 'a'knur'led nut 48. 7 e

Onthe supportflO is fixedly mounted "anindiceto'r body e8 which is preferably "fastened to the upper surface of the support 40' by suitable clamping means such as screw l9 and knurled-nut 50 as shown. (so:

'llhe-indicat rbody 48 andits coop'eratinq parts areshown more clearly in Figsil and 5 and therefore will be described more particularly i connection with these figures. The torwa end of the indicator body h is depressed as shown at '51 and'has attached fihei'eto a. thin sheet o'hfiexible metal '52 indicator body 48.

Sliffli as a .thin sheet; of spring; steel. At its upper edge the flexible strip '52 s fasweed to head portion 53 for theindicetor arm. Directlyforward of the fiGXllJlQ SllIlP 52fonrthe indicator body l-8 is a pivotjbl supported by means of a slight depression in "ascrew 56 inserte rlinthe part 51 of the This pivot 5e aids in supporting the member 53 and also the 111- centrally in the part '58 carriage. 35,'

dicator .p'ointeff55 extending forward thererrom in a horizontal plane. By ad ustmerit ofjfthe screw 56 the indicator arm may be raised or lowered in relation to the indicator body e8. Extending rearward from the center-cit the part 53 is a contact pin 60. lrei'erably this pin 60 is inserted in such a manner that it may readily removed as it is essential that number of diiierent sizes of these contact pins b provided to fit difterent types or sizes of threads.

The indicetor pointer:55 extendsio'rward just above and parallel to, the indicator '1 4O v which is accurately surfaced to contact with the anyil'17 of the .nieasuring head 14. A

spring 'fo inay'also be provided adjust-ably secured'to anvil 17 as shown' clearly in Figs.

(3 and .7 to hold the plate. 68in contact with the forward end of the anvil'17but'at the same time permitting the plate 68' to slide horizontallypast the anvil l7 modate the position of the indicator 4:8 to different sizes of gauges. This spring clamping means as shown, comprises a disk 71 clamped to the anvil. 17 and provided 'with the spring 7 O embracing the opposite sideof the plate 68 and pressing'the plate 68 and therefore the support Oand carriage toward the left. end firmly against the anyil 1.7.. I

To mount/the gauge being tested in posianvil' 17 I" provide a center 75 rnounted permanently on the base J10.

\ AjRQVHlDlB center in alignment with center'75 is'provided. preterablymou'nted on a n'io able taiistock Tailstock 77 is adapted to slide on suitable ways 78 provided on the base '10 paralleito the ways 25 and it may be clanipedin any'p osition along theways 78 by means oil-ever 7 9 and clampinn" member SOeXtend ngintO the T-slot 81 nr'the base. Center 7 6 may adjusted rel 'ative to the tailstock 77 by means of the sleeve 82 and knurled cap .83 in the-usual manner. H

During the operation of this measuring nachine it is essential that the contact mem oer -60 should'enga i'e the threadslbeing tested at a substantially uniform pressure. Th s isracconiplished first by careful ada 'plate 68, the outside surface 69, of

to accomdirection of movement of the measuring' justment of the support 4O on the carriage so that the properpressure of the leaf spring 52' acts to forcethe' contact member toward the gauge. 'IThesupport is then i clamped to the carriage 35 by means .of the clamping screw 47 and nut 48. Before this adjustment of the support -takes place an angle member "85 mounted on one side of the-carriage 35 is placed in cont-act with the contact button 86. The contacting surface of the angle '7 member 85 is at an right will v 7 permit the carriage to'slide along the taper of the gauge.-

Q J I also prefer'ably provide a leafspringf87 one side of the saddle 27; The opposite'end fWhat I claim is: i r 30 seen in'Fig. 2, and, as the knurled nut 91 is V enters the threads of the gauge it deflects t-he I indicator arm so that the pointer 61 is threads on lead.

7 fastened to the baSedO-andengaging the forward surface of the angle member 85 so thato't-he angle member 85 is resiliently pressed against the contact button 86 v In lieu of the clamping device 71 to hold the carriage 35in position so that the plate 68' on the support 4:0is in contact with the anvil l7 I-may provide a; rod 90 extending along thelbase 10 andfa'stened atone end to of the rod 90-is engaged b-yi a knurled nut 91." Between the saddle 27 and a part of thc'base 10 is a light spring 92: This spring 92tends to hold the carriage: 27 toward the left as adjustech'permits movement of the carriage in either direction. Bv means of the knurled nut 91 thesaddle 27 and therefore the s'upport 40 and the indicator 61 maybe positioned properly in measuring position As soonas this takes placethe anvil 17 may be 7 brought up against the plate 68 and a reading taken. Repeated readingso-f the position of the anvil 17 when the contact mem ber is in engagement withrthe different the gauge serves to indicate the To measure the lead of any tapered screw by means of the mechanism'above described carrying the indicator bcdy lS into contact with one .of the convolutlons of the screw thread. As soonas thecontactmember 6.)

r not in alignment with the zero line- 62 on the indicator body 48. Theknurled head 19 is thenrotated, moving" the measuring head anvil 1 7 in a direction to allow the indicator ward end of the anvil 17 by 'thespringclamp pointer 61 overthe mark 62by means ofthe 70, s As soonas the pointer '61 is in alignment with themark62 a reading of the dial 20 andscale 21 is taken. The contact meni- 1' her 60 is then withdrawn. from the convolu; 1

tions of the gauge'preferably by flexure of the stripl52 and with the anvil 17 adjusted slightly the contact member 60 is again allowed-t0 enter anotherconvolution. The pointer- 61 is again centered .over the mark 62 by adjustment of the knurled head 19 lead of the threads onthe gauge. t If'desired, the spring clamping 'means 70 a comparison of the readingsindicating the for the anvil 17iandplate 68jmay be dispensed with and the carriage35 may be ad-e justed to the left or right to; center the rod'9O and nut 91; After the carriage 35 has, been adjusted accurately so that the pointerfil is properly positioned, the anvil 17 is'adju'sted by means of the knurled head 19 until the forward end of the anvil 17 isin contact with the plate 68. With the anvil 17in that position areading of th di lgq and scale'21 is then taken. 7

nation, a base, a support on said base for said-gauge, a carriage, an indicator on said carriage adapted to contact with the gauge being tested, means to position said carriage in accordance with differences in diameterof the parts of the gauge, and means to accurately determine movements of said carriage parallel to the axis of the gauge. 2.;A lead 'measuring device for tapered screw thread gauges comprising in combination,- a base, asupport on said base for said gauge, a carriage, a resiliently mounted indicator onsaid carriageeadapted to ,contact'with the gauge beingtested, means to posltlon said carriage in accordance with differences in diameter of the parts of the gauge, and means to accurately determine p movements of saidvcarr ageparallel to the axis of thegauge. t

t ,3. A lea-d measuring device for tapered screw thread gauges comprising in combination, abase,:a pair ofucenterson said'base' for mounting said gauge, a can'iage, an iii-I dicator on said carriage adapted to contact with the gauge being tested, means to posi-' tion said carriage toward orfrom said centors in accordance with differences in die ameter of the parts of the gauge, and means I v to accurately determine movements of said carriage parallel to the axis of said centers.

LA lead measuring device for tapered screwthread gauges comprising in combination,'a base, a support on said base for said gauge, a carnage, anind cator on sald carno i n36 71A lead measuring device for-tapered triage adapted to contact with the gauge being tested, means to position said carriage in accordance With differences in diameter of the parts of the gauge, and a measuring ahead on said base to accurately determine movements of said carriage parallel to the axis of the gauge. v.

SJA lead measuring device for tapered screw thread gauges comprising in combina 10' tion, a base, a pair of centers on said base for mounting said gauge, a carriage, an ihdicator on said carriage adapted to contact with the gauge being't'ested, means to position said carriage toward or from said :cen

tors in accordance with'di lferences in diame- ;er of the parts of the gauge, and a measur- 'head on said base to accurately detere movements or said carriage parallel to the axis of the centers. 7 I

'20- 6. A. lead measuring device i'for'tapered rewthread gaugesjcoinprising in combina-' m, a base-,a support on said base for said ge, a 'nieasuring-head having a measuring I ii, an indicator adapted to contact-With 3 zhe :gauge;heing tested, a arriage' iforsaid cator, means to determine the position of "indicator along the taper oi the gauge,

s and means holding said carriage toward the measuring a'nvil'of said nieiring head.

, screw thread gauges comprisingin COlT'iljlllZif lion, a base, a support on said basefor-said I gauge, a measuring head having a measur ing anvil, resiliently mounted indicator adapted to 'contact'with the gauge being tested, a Cfillldgflfbl said indicatoiymeans to determine't-he position of said carriage along the taper of the gauge, and nie'ans holding said carriage toward the measuring 9 anvil of said measuring head. l p 8. A lead measuring device for tapered screw thread gauges comprising in combinatioii, a base, a pair'oi: centers on said base for. 1 supporting said gauge, a measuring head an indicator adapted to contact with the gauge 7 being testedQ a "carriage :tor' said indicator adapted to slide in a direction parallel to'the :axis oi 'said centers, means to determine the position of said indicator alongathe taper of the gauge, and means holdingsaid carriage toward the mea'suring'anvil of 'said ineasur-- ingh'eadJ Y f 9. lead measuring devicey ior tapered I screvv thread gauges comprisingin combina- Y tion,a base, a support on-said base forsaid gauge, aineasuring head having a .nieasuring' anvil an indicator adapted to contact with the gaugebeing tested, a carriage for 7 said indicator adapted to slide in any Cl1l8C j tion on said base, means to determine the position of said indicator along the taper oi the gauge, and means holding said carriage toward the measuring anvil oi said measur-. ing head. V r t 3 10. A lead measuring device "for tapered screw thread gaugescomprising in combination, abase, a pairxof centersonsaidlbase for said gauge, a measuring head movable in direction-parallel Withthe. axis of said centers, an indicator adapted to 'contactwith the gaugerbeing tested; a carriage for Said indicator slidable in anydirection on said base, ,means to determine the position of said indicator along the taper oi the gauge, and l means resiliently, holding said carriage toward the; measuring anvil oi? said'measuring head.

ii. A. leadmeasuring device for tapered screw thread gauges comprising in combinatioii, a'base, -supporton saidbase i'for said gauge, a' 'easuring head thereon havingfa' ineasurin Contact riage-ier said indicator, means to'guide said carriage in a direction parallel to thetaper 1 of the gauge, and ineansfholding saidcarriage towardythe measuring anvil'of sa dineasuring head.

7 12; A lead ineasuringdevice for taperedt Head-gauges comprising in combinaa'base, a DEL-ll'Of centers on said base for said gauge, a measuring headt'thereon hav: ing a'nieasuring aIlVllIllOVfiblG parallel to the axis of said centers, an indicator adapted to contact with the gauge being tested, a

c rriage' for said indicator, means'to'guide said carriage in a direction parallel to the taper for the gauge, and neans holding said carriage toward the measuringanvil of said measuring headi l 13. A lead measuring devicei'or tapered anvil, an indicator adapted to, 'Itl'llJhE gauge beingtestedga car v screw thread gauges comprising in combinaa tion, a base, asupport on'said base forsaid gauge, ameasuiing vhead thereon having a.

measuring anvil, an indicator adapted to contact with the gauge being tested, a car-v riage for said" indicator movable in any direction, means to guide said carriage. in a direction parallel to the taper of the gauge,

and means holding said carriage toward the measuring anvil ol said measuring;head.

signature.

REUBEN HILL,

In testimony whereofl hereto a'ffix 

